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Patented Feb. 6, 1883.

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N UNITED TATES' PATENT GFFICE.

JOSEPH P. WHITE, F SAVANNAH, GEORGIA.

I v LOCK.

SPECIFICATION forming; part of Letters Patent'No. 271,962, datedFebruary 6, 1883.

Application tiled March 28, 1882. (Model.)

[0 all 'whom 'it may concern Be it known that I, JosEPlI I. WHITE, acitizen of the United States, residing at Savannah, in the countyChatham and State of Georgia, have invented certain new and usefulImprovements in Locks, of which the following is aspeciication,reference being had therein to the accompanying drawings.

My invention relates to improvements in locks, which are to be appliedto doors and to other devices which it is desirable to keep locked; a-ndthe objects of my invention are, first, to provide a lock for suchpurposes that shall be burglar-proof, or one that cannot be opened bydrilling or cutting away the bolts which hold the parts in their lockedposition;

and, second, to provide a novel construction and combination ot' theparts of which it is composed. I attain these objects by the meansdescribed and by the mechanism illustrated in the accompanying drawings,in Which- Figure 1 is a front elevation of my lock,

, showing a plate of hardened steel, a handle for turning thelocking-cylinder and its extension, the outer end of the key, and thepin-lifting slide. Fig. 2 is a side elevation, showing the parts abovenamed, the casin g, the extension of the locking-cylinder that passesthrough the door or other device to which the lock is applied, thelocking-arm upon its inner end, the pin-lifting slides, and a pivotedarm, the key being in position. Fig. 3 is a sectional elevation, showingthe positions of the parts above enumerated, and also the springs whichoperate the locking-pins. Fig. 4 isa transverse section,showingthecasing in which the lockingcylinder works, the cylinder in position, oneof the locking-pins passing through it, the spring which operates it,the pivoted lever which lifts the bolts, the space into which the key isthrust for unlocking the door or other device, and the vertical slidefor raisin gthe pins when the key is inserted or withdrawn. Fig. 5 is aperspective view of a block or appendage which carries the horizontalslide, the pivoted arm or lever, and a vertically-moving slide forlifting the locking-pins. Fig. 6 is a. perspective view of the vertically-movin g slide. Fig. 7 is an elevation ot' the arm ot' the lockingpins,showing a pin or projection upon one ot' its sides, which rests upon thevertically-moving slide;l and Fig. 8 is a plan view of a key,

| showing one arrangement of apertures for the plns.

Similar letters refer to similar parts throughout the several views.

In locks in which a series ot locking-pins have been employed verylittle protection has been afforded, on account of the fact that aburglar or other persons seeking to gain admission to the apartmentcould readily do so by drilling a small hole through the t'ront plateofthe lock and then through the extension,

ing-cylinder can be turned and the door or other device opened byturning the lockingcylinder.

My invention is designed to remove this objection; and lo this end,inconstructing locks, I prgvide a plate, A, of any desired dimensions,according to the device to which it is to be applied. This plate Iprefer to make of steel, and to harden it to such an extent as to renderit im possible to perforate it with a drill. Instead of' making thisplate ot' steel, it may be made ot' chilled cast-iron `or of any othermaterial that will resist' the action of a drill.

As a further protection against drilling away the locking-pins, it ispreterred to place upon the outer end ot' the locking-cylinder andbetween the plate A and handle B a hardened collar, B', the diameter ot'which 'is to be equal to or greater than that of the cylinder. Thiscollar is also to be made impervious to a drill. This having been done,thereis no part where a drill can be used t'or cutting away theoperating parts ofthe lock, and thus gaining access to the apartmentupon which it is placed.

I will now proceed to describe the features of novelty in theconstruction, combinations,

lock is composed.

To the inner face ol' the plate A there is secured by soldering,riveting, or by casting thereon a projection, C, the central portion ot'which is cylindrical in form, as shown in Fig. 2, and is bored out toreceive the locking-cylinder C', as shown in Fig. 3. Upon two sides ot'the projection C there is placed flanges C2 G2, through which a seriesof holes are drilled, the number being such as to admit of the insertionof the desired number of lockingpins-say live or more or less. Theholesjnst thus cutting olf all of the pins, when the lock-V receptionot' the pointed ends of the locking- 1 and arrangements ot' the parts ofwhich this lOOl 1alluded to are extended through both of theprojections, care being taken to have those in one exactly in line withthose in the other, so that the locking-bolts may slide freely throughthen1.- The locking-cylinder O also has a series of holes formed in it,which correspond in number` and size with those in the projections, asshown in Fig. 3. Thelocking-pins are designated by D D D2 I)3 D4, theybeing preferably of hardened steel in order that they may resist theaction of the burglars drill, and made in three sections, as shown inFig. 3, one ofthe sections being placed in the upper projection G2, onein the locking-cylinder G',and the other in the lower projection G2.Above each of the upper sections there is placeda spring, E, saidsprings being held in position by a sliding plate, E. The lowersections'of these bolts are pointed at their lower ends, as shown, andeach one of them is provided with a projection or pin, E2, asshown inFig. 7. The combination and arrangement ofthe lastnamed parts are suchthat when the lockingcylinder is in this position the ditlerent sectionswill move freely up and down, but will not prevent the locking-cylinderfrom being turned by the handleB into such a position as to cause arm E3to withdraw amain locking-bolt which maybe attached to the doors of asafe or other device, and thus unlock it, or so as to throw saidlocking-bolt into its locking position-a function which said armperforms in addition to that of holding the lock in or upon the door.The locking-pins E are brougbl;,nto this their unlocked position by theinsert-ion of the key F, as shown in Fig. 3, it being provided witha'series ota .holes of different diameters, as shown in Fig. 8. 'loenable the operator to insert the key, there is arranged in a block ofmetal, G, which is secured to the lower projection C2 of'the casing, ahorizontallysliding pin, G', the inner end of which comes in contactwith -a bellcrank lever, G2, the effect of a push upon the pin being tocause the lower arm of said lever to come in contact with the lower endof' a vertical slide, G3, which works in a slot formed in the block G,and raising it upward, in doing which a horizontal arm formed upon itsupper end, as shown in Fig. 6, is brought into contact with theprojections E2 on the lower sections of the locking-bolts, and bring thelatter into such po- `sition that the key can be inserted, at whichtimes, as before stated, the locking-cylinder can be turned into such aposition as to unlock the room or receptacle to which the lock isattached.

It will be observed that there is in the up'- per surface of block Garecess, into which the key passes on being inserted, and also that thesurface of this block has in it a series of Y as, if they are not of theproper arrangement and character, unlocking cannot be effected, owing tothe fact that some of them will enter either the lower projection or thelocking-cylinder while the others were in a proper position forunlocking.

An important feature of the lock is that by changing the location of theholes in the key and the pins in their places a variety ofcoinbiua-tions can be formed and the unlocking of one lock with a keymade for another lock be prevented. An examination of the drawings inthis case will show that it is nearly, if not quite, impossible to pickthe lock with any instrument passt-d through the key-hole, as, before itcan be unlocked, each one of the lockingpins has to be brought to anexact position and held there until all are adjusted, which cannot bedone with any instrument or instruments except a key fitted to theparticular lock to which it is applied.

The extension H otl the locking-cylinder is provided with ascrew-threadfor attaching the arm E3 thereto, by which means it may beadjusted to doors of any desired thickness.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

1. The combination ot' the plate A, the casing U, with its projectionsU2 G2, a series ot' locking-pins formed in three sections, the recessedblock G, and the key F, the parts being y constructed and arranged forjoint operation substantially. as set forth. i

2. The combination of the case O,tl1e re cessed block G,the'horizontally-sliding pin G', the lever G2, vertical slide G3, andthe sectional sliding locking :ri'is, substantially as and for thepurpose set forth.

In testimony whereof' I affix my signature in presence of two witnesses.

JOSEPH P. WHITE Witnesses:

S. H. VMGNEUR, H. G. Evnarr'r.

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